/* ARC Network — persistent site navigation
   Decided structure: four flat items, no dropdown.
   The ARC Network · The Practice · Foundations · Integration · Learn More · Begin the conversation →
   Used on every page; markup is duplicated per page, styles live here. */

.site-nav {
  position: sticky;
  top: 0;
  z-index: 60;
  background: color-mix(in oklab, var(--paper, #F4EEE2) 92%, transparent);
  -webkit-backdrop-filter: saturate(140%) blur(10px);
  backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid var(--rule, #D7CDBC);
}

.site-nav-inner {
  max-width: 980px;
  margin: 0 auto;
  padding: 15px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.site-nav .brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-sans, "Inter", sans-serif);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--ink, #1E1A14);
  text-decoration: none;
  border-bottom: none;
  white-space: nowrap;
}
.site-nav .brand:hover,
.site-nav .brand:focus { border-bottom: none; }
.site-nav .brand svg { display: block; flex-shrink: 0; }

.site-nav .site-links {
  display: flex;
  gap: 28px;
}
.site-nav .site-links a {
  font-family: var(--font-sans, "Inter", sans-serif);
  font-size: 13px;
  color: var(--ink-soft, #5A524A);
  border-bottom: 1px solid transparent;
  padding: 4px 0;
  white-space: nowrap;
  transition: color 0.18s ease, border-color 0.18s ease;
}
.site-nav .site-links a:hover { color: var(--ink, #1E1A14); border-bottom-color: transparent; }
.site-nav .site-links a[aria-current="page"] {
  color: var(--ink, #1E1A14);
  border-bottom-color: var(--accent-soft, #C9A687);
}

/* Tweak: small-caps nav links */
html[data-t-nav="caps"] .site-nav .site-links a {
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.site-nav .nav-actions {
  display: flex;
  align-items: center;
  gap: 18px;
}
.site-nav .begin-link {
  font-family: var(--font-sans, "Inter", sans-serif);
  font-size: 13px;
  color: var(--accent, #8B5A3C);
  border-bottom: 1px solid color-mix(in oklab, var(--accent, #8B5A3C) 35%, transparent);
  white-space: nowrap;
  transition: border-color 0.2s ease;
}
.site-nav .begin-link:hover { border-bottom-color: var(--accent, #8B5A3C); }
.site-nav .begin-short { display: none; }

/* Quiet menu button — mobile only */
.site-nav .nav-toggle {
  display: none;
  font-family: var(--font-sans, "Inter", sans-serif);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--ink-soft, #5A524A);
  background: none;
  border: 1px solid var(--rule-strong, #C9BFA8);
  border-radius: 16px;
  padding: 6px 15px;
  cursor: pointer;
  transition: color 0.18s ease, border-color 0.18s ease;
}
.site-nav .nav-toggle:hover { color: var(--ink, #1E1A14); border-color: var(--ink-mute, #877F74); }

/* Collapsed sheet — mobile only */
.site-nav .nav-sheet { display: none; }

@media (max-width: 780px) {
  .site-nav .site-links { display: none; }
  .site-nav .nav-toggle { display: inline-block; }
  .site-nav .nav-sheet.open {
    display: flex;
    flex-direction: column;
    border-top: 1px solid var(--rule, #D7CDBC);
    padding: 6px 28px 14px;
  }
  .site-nav .nav-sheet a {
    font-family: var(--font-sans, "Inter", sans-serif);
    font-size: 15px;
    color: var(--ink-soft, #5A524A);
    border-bottom: 1px solid var(--rule, #D7CDBC);
    padding: 13px 0;
  }
  .site-nav .nav-sheet a:last-child { border-bottom: none; }
  .site-nav .nav-sheet a[aria-current="page"] { color: var(--ink, #1E1A14); }
}

@media (max-width: 480px) {
  .site-nav-inner { padding: 13px 20px; gap: 14px; }
  .site-nav .begin-long { display: none; }
  .site-nav .begin-short { display: inline; }
}

@media (max-width: 360px) {
  .site-nav .brand span { display: none; }
}

/* Focus visibility */
.site-nav a:focus-visible,
.site-nav button:focus-visible {
  outline: 2px solid var(--accent, #8B5A3C);
  outline-offset: 3px;
  border-radius: 2px;
}